Swim vest with dorsal fin



FIG. 1 is a side view of a swim vest with dorsal fin incorporating my design;

FIG. 2 is a front view;

FIG. 3 is a back view;

FIG. 4 is a top plan view; and

FIG. 5 is a bottom view. 

The ornamental design for a swim vest with dorsal fin, substantially as shown and described above. 